🥦
【Dart/Flutter】if文によるWidget表示(「...」演算子でList<Widget>として複数表示)
【Dart/Flutter】if文によるWidget表示(「...」でList<Widget>として複数表示)
- 実行環境
-
DartPadやAndroid Studio等で実行
- Based on Flutter 3.0.1 Dart SDK 2.17.1
-
DartPadやAndroid Studio等で実行
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Column(
children: const <Widget>[
if (true) Text('1:displayed'),
if (false) Text('2:not displayed'),
if (true) ...[
Text('3:displayed'),
Text('4:displayed'),
],
if (false) ...[
Text('5:not displayed'),
Text('6:not displayed'),
],
Text('7:displayed'),
],
),
),
);
}
}
実行結果※画面イメージ
1:displayed
3:displayed
4:displayed
7:displayed
Discussion